I've always wondered this myself thora. However, could it not be a possibility that SHW takes an existing product and is now testing the formulation with a green polyurethane binder?
They would simply come and say(when it's finished) now we have a new and improved version of this coating that is environmentally friendly, green green green.
I've said this before, I don't think we are going to find these non Iso products online that have anything to do with HCT because they simply do not exist for the public to see yet.
It will be much like the industrial finishes find. You are only going to find it when they let you, and it will be direct from the partner and have HCTI written all over it.